The size depends on what bit rate gets downloaded and cached as you watch them. If you have fast internet, then you will likely get the highest resolution videos and they can be pretty large. I checked out the total size of the video files for some of the examples Jan gave, and they could over twice as large as what he listed.

To clear out your downloaded video files open a course's video resource to the Overview section. Open the drop down menu and select "Delete downloaded media."

I am asking because I don't have high speed internet (not available, except satellite, and that costs too much). So, are those the sizes for all the videos in each of those classes? I am wondering if I can download the videos ahead of time while at the local library, using their internet so I don't kill my mobile hot-spot allowances?

Yes. Open the video resource, and in the drop down menu there is an option to "Download all media." What size/video resolution you download will depend on the internet speed you have available, so I can't tell you exactly how much space they will take up.

Yes. Open the video resource, and in the drop down menu there is an option to "Download all media." What size/video resolution you download will depend on the internet speed you have available, so I can't tell you exactly how much space they will take up.

Looks like the videos for that course show take up between 4 and 8 GB. After clicking Download all media the option in the drop down will change to "Cancel media download" until the download is complete. That's the only way to monitor the download status.

I think the video quality is not very high. I can understand that high quality (amount of pixels) takes more space. But in the 7 cities video overexposure is common (lack of dynamic range, clipping, high contrast).